mitrailleuse
mitrailleuse is a field gun or machine gun.
Overview
Type of volley gun.
In detail
It is associated with Second French Empire.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Mitrailleuse”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1760834: mitrailleuse
Consult the source